Cook onions in large skillet on medium heat 5 min.,______,Add garlic; cook and stir 1 min.,Add meat, 1/3 cup cilantro, vinegar and allspice; mix well.,Cook 10 min.,or until meat is no longer pink and liquid is cooked off, stirring occasionally.,Stir in potatoes and jalapenos; cover.,Cook 5 min.,or until heated through, stirring occasionally.,Spoon onto tostadas; top with cheese and remaining cilantro.